Sustaining Engineer

About Us:

Proofpoint is a global leader in human- and agent-centric cybersecurity. We protect how people, data, and AI agents connect across email, cloud, and collaboration tools. Over 80 of the Fortune 100, 10,000 large enterprises, and millions of smaller organizations trust Proofpoint to stop threats, prevent data loss, and build resilience across their people and AI workflows. Our mission is simple: safeguard the digital world and empower people to work securely and confidently.

Join us in our pursuit to defend data and protect people.

At Proofpoint you’ll be part of a global team that breaks barriers to redefine cybersecurity guided by our BRAVE core values:

At Proofpoint, we protect people, data, and brands from advanced threats and compliance risks. We build and operate a highly scalable cloud security platform trusted by more than half of the Fortune 100. Our teams combine deep technical expertise with operational excellence to deliver resilient, high‑scale systems that customers rely on every day.

We are seeking a highly technical Sustaining Engineer to support and strengthen our Archive platform. This role sits at the intersection of engineering and production operations and is responsible for deep technical investigations, root cause analysis, and long‑term stability improvements.

Our Archive solution is a large‑scale distributed system spanning legacy data center components and modern AWS cloud infrastructure. The codebase is extensive and complex, and this role requires a full stack engineer who can move confidently across services, APIs, databases, messaging systems, and infrastructure layers.

This is not a traditional support role. You will act as an engineering owner for production issues, working directly in the code, debugging live systems, and implementing durable fixes that improve reliability and performance.

You will also participate in a 24x7 on‑call rotation and play a key role in maintaining production health for mission critical services.

• Lead deep technical investigations into production issues across the Archive platform

• Perform root cause analysis across application, database, infrastructure, and cloud layers

• Implement code level and architectural fixes to improve system reliability

• Partner with Support and Product teams on high severity customer escalations

• Drive systemic improvements that reduce recurring incidents and operational toil

• Improve observability, logging, and debugging capabilities

• Contribute to zero downtime deployments and service resiliency improvements

• Participate in on‑call rotation and respond to critical production incidents

• 5 or more years of experience building and operating commercial software systems

• Strong proficiency in one or more object oriented languages such as C#, Java, or C++

• Deep understanding of distributed systems, concurrency, and high availability architectures

• Experience debugging complex, large scale production systems

• Full stack capability across backend services, APIs, databases, and infrastructure

• Experience working in hybrid environments spanning data center and AWS cloud

• Strong troubleshooting and analytical skills with the ability to diagnose ambiguous system failures

• Experience with CI/CD, source control, automated testing, and production monitoring tools

• Ability to work effectively in high pressure situations and manage multiple priorities

• Excellent communication skills and the ability to explain complex technical issues clearly

• Experience with Microsoft Exchange and MAPI

• Experience operating systems in AWS including EC2, S3, RDS, IAM, and related services

• Familiarity with messaging systems, search platforms, and large scale storage systems

• Experience participating in or leading incident response

The Archive platform supports some of the largest organizations in the world.…